High
CVSS 8.1 CORS Responsible Disclosure
Disclosure
CORS Misconfiguration - Access-Control-Allow-Origin: with Sensitive Data
The API returns Access-Control-Allow-Origin: on ALL responses, including those containing PII bank data. Combined with the IDOR (Finding 1), this means any website can read any user's bank information via JavaScript cross-origin requests
- Target
- SEA Crypto Exchange
- Category
- CORS
- Channel
- Responsible Disclosure
- Disclosed
- 2026-04
Redaction note
Vendor identity withheld.
This finding is documented here as part of MemCyber’s public disclosure record. The vendor has been anonymized to a sector and region descriptor. Full technical detail — including root cause, reproducible proof-of-concept, remediation guidance, and vendor attribution where granted — is available to qualified prospects under NDA.
Coordinated disclosure
How we handled it.
- Reported to the vendor via Responsible Disclosure with a reproducible proof-of-concept.
- Triage + remediation window coordinated with the vendor security team.
- Fix verified before any public reference.
- This record published only after the embargo period closed.